Aluminosilicate Glass refers to glass that has aluminum oxide in its composition. It is crystal clear and has good chemical stability, electrical insulation, mechanical strength and low thermal expansion coefficient. It is widely used for manufacturing gauge glass and sight glass. No surface defects Great chemical resistance Allowing for high operating temperature of up to 600 C Hydrolytic resistance Acid & alkali resistance A full range of sizes Special discounts for large orders and various promotion campaigns Specification Color: colorless or slightly yellow Shape: circular, rectangular Density: 2.62 2.67 g/cm3 Transmissivity: 91.8% Refractive index: 1.5325 (yellow) Shock temperature: 370 C Softening temperature: 920 C Bending strength: 180 220 MPa